[Sync] Renaming client key to client tag.

sync/internal_api/test/fake_model_type_service.cc

Index: sync/internal_api/test/fake_model_type_service.cc
diff --git a/sync/internal_api/test/fake_model_type_service.cc b/sync/internal_api/test/fake_model_type_service.cc
index d31388f66726fe8be9591178796e75444a2fe7f8..5aad325fcc50f4031d5ebdcad64d79bbc6c9813f 100644
--- a/sync/internal_api/test/fake_model_type_service.cc
+++ b/sync/internal_api/test/fake_model_type_service.cc
@@ -29,7 +29,7 @@ syncer::SyncError FakeModelTypeService::ApplySyncChanges(
 
 void FakeModelTypeService::LoadMetadata(MetadataCallback callback) {}
 
-void FakeModelTypeService::GetData(ClientKeyList client_keys,
+void FakeModelTypeService::GetData(ClientTagList client_tags,
                                    DataCallback callback) {}
 
 void FakeModelTypeService::GetAllData(DataCallback callback) {}